Comparison of fluoride release and solubility for different glass ionomer cements / 中国组织工程研究

ABSTRACT

BACKGROUND:Modified glass ionomer cements improve the mechanical properties, abrasion resistance and beauty of traditional glass ionomer cements, and therefore they have been gradualy adopted in many fields of oral clinical application. However, it is not clear that the fluoride release behavior and soluble characteristics. OBJECTIVE:To investigate the fluoride release behavior and soluble characteristics of four glass ionomer cements in artificial saliva Fuji II tranditional type, Fuji Plus hydroxyapatite modified type, Fuji IX metal modified type, and Fuji II LC light-curing resin modified type. METHODS: For each glass ionomer cement, cylindrical specimens were made and immerged into the artificial saliva. Fluoride release within 0-28 days was measured by using fluoride ion selective electrode. The weight of specimens was measured by using an analytical balance to further calculate the solubility. SPSS and Origin software were used for statistical analysis and nonlinear regression analysis, respectively. RESULTS AND CONCLUSION:For each glass ionomer cement, the fluoride release was peaked at the first day, decreased rapidly for the folowing several days, and then kept relatively stable at the end. The daily amount and accumulation of fluoride of Fuji II LC were significantly higher than those of other three glass ionomer cements (P < 0.01). The formula (Y=a + b* t0.5 + c* t) could better simulate the variation of fluoride release accumulations, and the fluoride release accumulations were in approximate proportional relationship with solubility. Fuji II LC reached the maximum fluoride release accumulations and the maximum ratio of fluoride release accumulations to solubility.